Al*li"ance (?), n. [OE. aliaunce, OF. aliance, F. alliance, fr. OF. alier, F. allier. See Ally, and cf. LL. alligantia.] 1. The state of being allied; the act of allying or uniting; a union or connection of interests between families, states, parties, etc., especially between families by marriage and states by compact, treaty, or league; as, matrimonial alliances; an alliance between church and state; an alliance between France and England.

2. Any union resembling that of families or states; union by relationship in qualities; affinity.

The alliance of the principles of the world with those of the gospel.
C. J. Smith.

The alliance . . . between logic and metaphysics.

3. The persons or parties allied. Udall.

Syn. -- Connection; affinity; union; confederacy; confederation; league; coalition.

Al*li"ance, v. t. To connect by alliance; to ally. [Obs.]